I don’t have a LiteOn drive, but strictly based on the PIF totals, there’s little distinction. Personally, if I did have a LiteOn drive, I would use the 4x speed as my indicator, as that’s been the standard for so long, just like 2x for the Plextor 716a (and I tested between two settings extensively–“high accuracy” and “good accuracy” under Plextools and found “good accuracy” was so close to the results under “high accuracy,” but cut the time for scanning in half, that the “good accuracy” could be used for pretty conclusive scanning results) has been the standard considered most accurate. However, that said, if you run 4x and 8x scans, and keep finding the PIF totals just as close as this one, the 8x should be fine. I would think, though, that a certain ‘difference’ should be accepted before LiteOns are used to scan at 8x instead of 4x; it would convince me to use 8x if many users would show 4x and 8x scans, then see what the average PIF total difference is; if it’s no more than +/- 15-20 total PIF, I’d say the 8x would be fine. In the end, the scan is just an indication of burn quality, and if your scanning speed does give you consistently good results as another speed, I would see no problem using the faster speed.